Pinpointing under extrusion problem

[anxjfarnorth 4]

yeah I was messing with mine and I had mine lose as well which helped but it always ended the same way........

[larsgw 2]

Seems to be fixed! I put a washer under the large gear, which pushed it out to meet more solidly with the gear from the motor. Print quality is currently back to where it was before the problem - no skipping, no under extrusion.

Major kudos to you Anxjfarnorth, for locating the problem.

[kris 29]

This might be the problem:UM2+ design flaw

[larsgw 2]

This might be the problem:UM2+ design flaw

 

Thanks for posting. The arm in mine is fine. It seems the issue is that there isn't enough of an overlap in the two gears on the back of the filament feeder. I used a washer to push the larger gear out, and now it works fine. It looks like there's also room to push the gear on the motor out from the motor a little further (it's not seated at the end of the shaft, but rather farther up).